Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
  • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
  • C08G65/32—Polymers modified by chemical after-treatment
  • C08G65/329—Polymers modified by chemical after-treatment with organic compounds
  • C08G65/334—Polymers modified by chemical after-treatment with organic compounds containing sulfur
  • C08G65/3344—Polymers modified by chemical after-treatment with organic compounds containing sulfur containing oxygen in addition to sulfur
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
  • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
  • C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
  • C08G65/2603—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen
  • C08G65/2606—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups
  • C08G65/2609—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups containing aliphatic hydroxyl groups

Definitions

• the present invention relates to a new process for the preparation of etherified polyoxyalkylene derivatives by reacting the corresponding free hydroxy compounds with dialkyl sulfate in the presence of an aqueous solution of an alkali metal hydroxide.
• a process for the production of etherified polyoxyalkylene compounds is also known, in which the free hydroxy compounds are mixed with an organic halide, e.g. with butyl chloride, in the presence of an aqueous solution of sodium or potassium hydroxide, the initial concentration of sodium or potassium hydroxide of which is at least 30% by weight, based on the aqueous solution, at a temperature which is generally in the range from 80 to 100.degree lies, treated.
• an organic halide e.g. with butyl chloride
• the object of the present invention was to provide a new process by means of which the etherification of polyoxyalkylene derivatives can be carried out in a simple manner and with good yields.
• R ', R 4 and R 5 are, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl or sec-butyl.
• R 'and R 5 are furthermore, for example, pentyl. Isopentyl, neopentyl, tert-pentyl, hexyl, 2-methylpentyl, heptyl, octyl, 2-ethylhexyl, osooctyl, nonyl, isononyl, decyl. Isodecyl.
• polyoxyalkylene derivatives of the formula II are those in which the sum of m and n is 3 to 10 or 50 to 100.
• a dialkyl sulfate of the formula III in which R 4 is ethyl or in particular methyl is preferred as the alkylating agent.
• Suitable alkali metal hydroxides are, for example, lithium hydroxides, sodium hydroxide or potassium hydroxide.
• the use of potassium hydroxide and especially sodium hydroxide is preferred.
• At least 1 mole, preferably 1.2 to 2.5 moles of dialkyl sulfate III and at least 1 mole, preferably 3 to 20 moles of alkali metal hydroxide are used per mole equivalent of organic hydroxyl groups in the starting product II.
• the concentration of alkali metal hydroxide should not fall below 35% by weight, based on the aqueous phase, during the entire duration of the reaction. For this reason, an aqueous alkali metal hydroxide solution whose alkali metal hydroxide concentration is approximately 50% by weight is advantageously chosen as the reagent.
• the process according to the invention is expediently carried out by initially introducing the polyoxyalkylene derivative II to be etherified together with 20 to 50%, preferably 25 to 30%, of the aqueous alkali metal hydroxide solution, in each case based on the total amount of aqueous alkali metal hydroxide solution required for the reaction, and then about 25% of the total amount of dialkyl sulfate required is metered in at such a rate that the temperature of the reaction mixture is 20 to 60 ° C., preferably 30 to 50 ° C. The temperature range from 38 to 42 C. is particularly preferred.
• the remaining part of the aqueous alkali hydroxide solution ie 50 to 80%, preferably 70 to 75%, in each case based on the total amount of aqueous alkali hydroxide solution required for the reaction, is added to the reaction mixture with about 50% of the total amount of dialkyl sulfate required.
• the components are added simultaneously, but spatially separated from one another. When adding, ensure that the above-mentioned temperature of the reaction mixture is maintained.
• dialkyl sulfate is metered into the reaction mixture to the extent that the temperature mentioned above is also maintained here.
• the resulting reaction mixture is mixed with water and heated to a temperature of 80 to 100 ° C.
• the aqueous phase is then separated off and the organic phase is concentrated under reduced pressure. Smaller amounts of salt, which can occur under certain circumstances, are filtered off.
• the process according to the invention is usually carried out without a solvent. In some cases, however, it may be advantageous to carry out the reaction in the presence of an inert organic solvent, e.g. Toluene or petroleum ether.
• an inert organic solvent e.g. Toluene or petroleum ether.
• a protective gas atmosphere e.g. to work under nitrogen.
• the new process can be carried out in a batch or continuous mode.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Polyethers (AREA)

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Publications (2)

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Citations (4)

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• 1987
  • 1987-08-06 DE DE19873726121 patent/DE3726121A1/de active Granted
• 1988
  • 1988-08-04 DE DE88112674T patent/DE3885670D1/de not_active Expired - Lifetime
  • 1988-08-04 EP EP88112674A patent/EP0302487B1/fr not_active Expired - Lifetime
  • 1988-08-05 NO NO883506A patent/NO166855C/no not_active IP Right Cessation
  • 1988-08-05 JP JP63194739A patent/JP2541632B2/ja not_active Expired - Lifetime
  • 1988-08-05 US US07/228,488 patent/US4922029A/en not_active Expired - Lifetime
  • 1988-08-05 FI FI883664A patent/FI88026C/fi not_active IP Right Cessation
  • 1988-08-05 DK DK198804383A patent/DK172610B1/da not_active IP Right Cessation

Patent Citations (4)

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